Calculators — Guides & Articles
How to Convert Military Time to Minutes in Excel
Published 2026-08-09
Convert military time (HHMM) to total minutes in Excel with a LEFT/RIGHT/VALUE formula. See the step-by-step breakdown, a worked example, and a free online…
How to Calculate Iron Weight in kg: Bar, Pipe and Sheet
Published 2026-08-09
Calculate iron weight in kg from bar, pipe, sheet or hex stock size. Uses weight = volume × density with steel density 7850 kg/m³. Free instant tool.
Calculate Macros for Weight Loss From Any Calorie Target
Published 2026-08-09
Calculate macros for weight loss from any daily calorie target using the Atwater 4/4/9 factors. Pick Balanced, High-protein, or Low-carb and read grams…
Hardness Conversion Calculator: Accurate HRC, HRB, HV & HB
Published 2026-08-09
Convert steel hardness between HRC, HRB, Vickers and Brinell with an ASTM E140-based calculator. Accurate, private, instant results as you type.
How to Calculate Logarithm in Excel (LN, LOG, LOG10)
Published 2026-08-09
Calculate logarithms in Excel with LN, LOG, and LOG10. Step-by-step formulas, the change-of-base method, and a free browser tool for instant verification.
How to Calculate Leap Year Birthday Dates
Published 2026-08-09
A leap year birthday falls on February 29 only every 4 years. Use the Gregorian rule plus a free calculator to find the actual date for any birth year.
How to Calculate LCM for Accounting Fractions
Published 2026-08-09
Step-by-step guide to calculating LCM for accounting tasks: common denominators, repeating cycles, and schedules, with the free LCM Calculator.
0/1 Knapsack Problem Calculator: Get the Optimal Subset
Published 2026-08-09
Solve the 0/1 knapsack problem instantly. Enter capacity and items as weight/value rows to get the exact optimal subset, total value, and unused capacity.
How to Calculate Day of the Week in Your Head
Published 2026-08-08
Mental methods for finding any date's weekday in your head, plus a free calculator that returns the day of the week for any past or future date instantly.
How to Calculate Ideal Weight by Height and Sex
Published 2026-08-08
Ideal weight by height and age: the classic IBW formulas use only height and sex. See how Devine, Robinson, Miller and Hamwi work and read the BMI range.